I have this minimal expression template library with a multiplication, i.e. template <typename T, typename U> struct mul { const T &v1; const U &v2; }; template <typename T, ty...

I would like to use the Eigen matrix library as the linear algebra engine in my program. Eigen uses expression templates to implement lazy evaluation and to simplify loops and calculations. For ex...

I have been looking at changing some code to make use of QStringBuilder expression template for its purported performance improvements. Unfortunately this resulted in sections of my code starting t...

The problem Suppose we implement a string class which represents, uhm, strings. We then want to add an operator+ which concatenates two strings, and decide to implement that via expression templat...

Expression templates are often used as an optimization technique to avoid the creation of temporary objects. They defer constructing the complete object until the template is used in an assignment ...

I have a set of operators that I need to override for expression templating. I would like all derived classes of a base type match to the base type. Other things would then be caught by a generic t...

We are trying to implement a new C++ code in my research group to perform large numerical simulations (finite elements, finite difference methods, topology optimization, etc.) The software will be ...

Let's look at one particular benefit of expression templates: ETs can be used to avoid vector-sized temporaries in memory which occur in overloaded operators like: template<typename T> std::...

Given an expression template tree, I want to create a new optimized tree before processing it. Consider the following example of a multiplication operation: a * b * c * d, which produces, due to...

I understand that doing something like the following: auto&& x = Matrix1() + Matrix2() + Matrix3(); std::cout << x(2,3) << std::endl; Will cause a silent runtime error if the...

I've always been under the impression that for any comparison statement, i.e. X == Y or X != Y is the format, and you chain statements together with && or ||. Is there not some way ...

I am currently writing a C++ template expression library and comparing some instantiations with hand-written code at assembly level. The hand-written function is the following: spinor multiply(vec...

I incurred in a compiler dependent issue with the following code (stored in crtp.cc): #include <vector> #include <cassert> #include <iostream> template < class Derived > c...

It is my understanding that expression templates will break on ranged based for in C++11, as for (auto x : expr) has an implicit auto&& __range = expr in it, and this will result in danglin...

I'm trying to make a grammar in Boost.Proto that matches a vector type, but when I give it a terminal of that type, it doesn't match the grammar. The type definition looks like this: template <...

With the following code, "hello2" is not displayed as the temporary string created on Line 3 dies before Line 4 is executed. Using a #define as on Line 1 avoids this issue, but is there a way to av...

I have the first version of a math library completed, and for the next step I'd like to turn to expression templates to improve the performance of the code. However, my initial results are differen...